There are lots of reasons you might want to upgrade the exhaust system on a Toyota Tundra. A more efficient exhaust system can increase your horsepower, improve your gas mileage, and make your truck sound better and more powerful.
Even the most durable spark plug will wear down over time from regular use. While some can last a decade or more, if your car’s a 2007 you’ll probably need to replace the spark plugs at some point. Aside from regular wear and tear, spark plugs can also become fouled by engine misfires, dirty oil, or other combustion system problems. Even if your spark plugs are newer than your car, there’s no guarantee they’re still operating at peak efficiency.